Premenstrual Syndrome (PMS)
Premenstrual syndrome (PMS) is a pattern of cyclical physical, cognitive, and emotional symptoms that appear in the luteal phase of the menstrual cycle and resolve with or shortly after the onset of menses. Common features include irritability, mood lability, bloating, breast tenderness, fatigue, and difficulty concentrating. The defining characteristic is the cyclical pattern: symptoms appear predictably after ovulation and clear with menstruation.[66]
Severity exists on a spectrum. The severe end, characterized by marked mood disruption and functional impairment, meets criteria for premenstrual dysphoric disorder (PMDD) as defined by DSM-5. Distinguishing PMS from PMDD, and both from conditions that worsen premenstrually (such as perimenstrual exacerbation of a mood disorder), requires prospective symptom tracking across at least two cycles.[66]
The cyclical pattern points directly to luteal phase function as the clinical question to investigate. Progesterone levels in the post-peak phase, thyroid function, and nutritional status are among the areas clinicians evaluate in women with significant premenstrual symptoms. Evidence from controlled trials supports a role for progesterone-based intervention in luteal phase support for PMS, though the literature reflects ongoing investigation rather than a single settled approach.[67] Fertility charting provides the cycle-phase precision that retrospective calendar estimates cannot, allowing clinicians to correlate symptom timing precisely with hormonal phase.
When PMS symptoms are severe or disabling, evaluation of luteal phase deficiency and thyroid function is a logical starting point. The peak day and post-peak phase charting markers provide the reference frame for identifying when in the cycle symptoms begin.
This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.